Prepare the turkey: Place the turkey breast skin-side down on a cutting board. Butterfly the thickest areas with a few careful slits, then cover with plastic wrap and pound with a meat mallet to an even thickness.
Mix the stuffing: In a bowl, combine the cooked stuffing, cooked sausage, and dried cranberries.
Stuff and roll: Spread the stuffing evenly over the turkey breast, gently pressing down so the stuffing adheres to the meat. Roll tightly from the long end and tie with kitchen twine in 3–4 places.
Make and apply the compound butter: Mix softened butter, olive oil, garlic, rosemary, sage, thyme, salt, and pepper. Rub the mixture all over the outside of the rolled turkey, tucking a little under the skin if possible.
Assemble the roasting pan: Arrange the onions and celery in a roasting pan. Place the turkey on top. Season with salt and pepper and pour the white wine around the pan.
Roast: Preheat oven to 425°F.
Roast the turkey for 1 hour 20–30 minutes, checking after the first hour. If the skin browns too quickly, tent with foil.
For extra crisp skin, broil for the last 3–5 minutes.
Rest and slice: Let the turkey rest 5–10 minutes. Remove the twine, then slice into thick rounds and serve.